带约束拉杆L形钢管混凝土短柱轴压性能的试验研究

进行了6个带约束拉杆和1个不设约束拉杆L形钢管混凝土短柱的轴心受压试验,分析了钢管壁厚度、约束拉杆直径和间距等主要参数对带约束拉杆L形钢管混凝土短柱轴压性能的影响.试验研究表明,在轴心压力作用下,设置了的L形钢管混凝土短柱的极限承载力有所提高,拉杆的设置能改善核心混凝土的约束作用,延迟或避免钢管在应力达到屈服强度前发生局部屈曲而导致构件的过早破坏,从而使L形钢管混凝土轴压短柱的延性有较大幅度的提高.

Experimental Investigation into Axial Compressive Behavior of L-Shaped Concrete-Filled Steel Tubular Stub Columns with Binding Bars

The axial compressive experiments of seven L-shaped concrete-filled steel tubular stub columns,six with and one without binding bars,were carried out.The effects of tube wall thickness,the diameter and spacing of the binding bars on the axial compressive behavior of the columns are analyzed.Experimental results indicate that the ultimate strength of the columns with binding bars increases,and that the setting of binding bars improves the confinement of the concrete core,delays or even avoids the local buckling of the steel tube before the stress attains the yield strength.The ductility of the columns is greatly increased.